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Dissertations / Theses on the topic 'Crop residue yield potential'

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1

Battaglia, Martin. "Crop residue management effects on crop production, greenhouse gases emissions, and soil quality in the Mid-Atlantic USA." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/86483.

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Cellulosic biomass-to-bioenergy systems can provide environmental and economic benefits to modern societies, reducing the dependence on fossil-fuels and greenhouse gas emissions while simultaneously improving rural economies. Corn (Zea mays L.) stover and wheat straw (Triticum aestivum L.) residues have particular promise given these crops are widely grown and their cellulosic fractions present a captured resource as a co-product of grain production. Annual systems also offer the ability to change crops rapidly in response to changing market demands. However, concerns exist about residue remov
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2

Adu-Tutu, K. O., W. B. McCloskey, S. H. Husman, et al. "Reduced Tillage and Crop Residue Effects on Cotton Weed Control, Growth and Yield." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/198156.

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The tillage operations conducted in a barley and cotton double-crop rotation were reduced by eliminating tillage prior to planting cotton, eliminating cultivations for weed control in cotton, and especially by eliminating tillage following cotton prior to planting barley. Data collected in 2002 and 2003 in Coolidge and Marana showed that a weed sensing, automatic spot-spray system reduced the amount of spray volume and herbicide used by 50 to 60%. Data from Maricopa in 2003 indicated that the savings can be much greater (e.g., in a treatment with thick Solum barley cover crop residues) or much
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3

Tarhuni, Abdalla Mohamed. "The potential for improved yield and yield stability in faba bean (Vicia faba L.) cultivar mixtures." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235564.

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4

Whelan, Helen G. "The effect of crop yield potential on disease yield loss relationships in barley (Hordeum vulgare L.)." Lincoln University, 1992. http://hdl.handle.net/10182/1980.

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Proportional loss models commonly used in disease surveys are based on the assumption that per cent yield loss is the same in all crops, regardless of their yield potential. Estimates of regional crop loss may be inaccurate if the relationship between disease and yield loss is affected by crop yield potential. The importance of crop yield potential in disease: yield loss modelling was investigated and models for more accurate regional crop loss estimates were developed, taking crop yield potential into account. Two spring sown barley (cv. Triumph) experiments were conducted in 1987/88 and 198
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5

Monteiro, Leonardo Amaral. "Sugarcane yield gap in Brazil: a crop modelling approach." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-08032016-142721/.

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Currently, the cropping area is around 10 million hectares, in which the sugarcane fields are expanding for marginal regions, mainly where grains and pasture were previously cultivated. From that, the objectives of this study were: to calibrate and evaluate a sugarcane yield model using data from 12 fields conducted under high technology field conditions; to evaluate the performance of a gridded system (NASA/POWER) to increase the spatial density of the weather stations in Brazil, to be employed as input data of crop simulation models; to map, in micro-region scale, the potential (Yp), the bes
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6

Nafi, Eeusha [Verfasser]. "Interactive tillage & crop residue management effects on soil properties, crop nutrient uptake & yield in different weathered soils of West Africa : measurements, modelling & scenario simulations / Eeusha Nafi." Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1235525945/34.

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7

Mühlig-Versen, Bernhard. "Effects of crop residue management, phosphorus application and molybdenum supply on yield and nutrient uptake of pearl millet, cowpea and groundnut in Sahelian cropping systems /." Beuren : Grauer, 2001. http://opac.nebis.ch/cgi-bin/showAbstract.pl?u20=3861863723.

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8

Twitchen, Carrie_Anne. "Impact of crop management during plant propagation on yield potential of Junebearer and Everbearer strawberry (Fragaria x ananassa Duch.) cultivars." Thesis, University of Reading, 2018. http://centaur.reading.ac.uk/78984/.

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Conditions during the autumn (propagation phase), when plants are developing and flowers are initiated, impact upon subsequent fruit production in strawberry (Fragaria x ananassa Duch.). Little is known about the best conditions in which to propagate strawberries, particularly for newly released cultivars from breeding programmes which often struggle to fulfil their yield potential when cropped in a commercial environment. The research presented in this thesis therefore aimed to examine the impact of crop management during the propagation phase on transplant growth, yield potential and the sub
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9

Choi, Suk-won. "The potential and cost of carbon sequestration in agricultural soil empirical study of dynamic model in the midwestern U.S /." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1095676113.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xiii, 133 p.; also includes graphics (some col.). Includes bibliographical references (p. 125-133).
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10

Cartwright, Luke. "The potential of poly (ADP-ribose) polymerase (PARP) inhibitors to improve plant growth and yield : novel crop protection agents under stressed conditions." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19289/.

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Chemical inhibition of the activity of poly (ADP-ribose) polymerases (PARPs) is associated with enhanced stress tolerance and growth in response to a broad range of abiotic plant stressors. This led to the suggestion that PARP inhibitors might have application in future crop protection strategies. However, the vast majority of studies to date have involved short-term, in vitro assays which are not representative of the conditions crop plants experience in the field. This work aimed to quantify the impact of chemical PARP inhibitor application on photosynthesis, growth and yield in planta, unde
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11

Nkebiwe, Peteh Mehdi [Verfasser], and Torsten [Akademischer Betreuer] Müller. "Fertilizer placement and the potential for its combination with bio-effectors to improve crop nutrient acquisition and yield / Peteh Mehdi Nkebiwe ; Betreuer: Torsten Müller." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2017. http://d-nb.info/1149521848/34.

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12

Graves, Leila Anne. "Plant Growth Regulator Sprays and Girdling: Potential Horticultural Techniques to Increase Fruit Retention and Yield of Longan (Dimocarpus longan Lour.) Trees in California." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/140.

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Abstract Plant Growth Regulator Sprays and Girdling: Potential Horticultural Techniques to Increase Fruit Retention and Yield of Longan (Dimocarpus longan Lour.) Trees in California Leila Graves June 2009 The longan is a subtropical fruit tree whose popularity is growing quickly among American consumers, and thus, could become a lucrative niche market for California growers. Trees planted as part of an initial variety trial conducted in commercial California orchards are beginning to bear fruit. However, fruit retention and yields are low due to excessive abscission during early fruit s
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13

Townsend, Marjorie Louise. "Overseeding the cover crops Hairy Vetch (Vicea Villosa Roth) and Medium Red Clover (Trofolium Pratense L.) into corn (Zea Mays L.) after the last cultivation: effects on corn yield and cover crop production of dry matter and ground cover residue." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1413464088.

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14

Galinier, Thomas. "Analyse multifactorielle de la performance des cultures - Méthodes et automatisation pour l’intégration de données agronomiques, environnementales, sociales et économiques - Exemple du maïs grain non-irrigué en Amérique du Nord." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC026.

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La demande mondiale de nourriture et d’energie est en constante augmentation. L’accès à de nouvelles terres arables étant limité, les agriculteurs devront produire environ 70% de plus par hectare d'ici 2050. L'optimisation et la rationalisation des systèmes de production agricole sont essentielles pour assurer la sécurité alimentaire des populations dans des conditions durables. La communauté agricole serait en mesure d'optimiser les performances des cultures en ayant accès à une meilleure compréhension des systèmes de production, notamment concernant leur potentiel et principaux facteurs limi
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15

Rezgui, Cyrine. "Etude du potentiel d'introduction de la culture du pois d'hiver dans les successions culturales en Normandie : conséquences sur les communautés microbiennes du sol et les flux d'azote Impacts of the winter pea crop (instead of rapeseed) on soil microbial communities, nitrogen balance and wheat yield Quantification et analyse des exsudats racinaires de pois, de blé et de colza : mise au point d’une méthodologie de collecte des exsudats racinaires N rhizodeposition quantification and root exudates characterization of pea (Pisum Sativum L.), rapeseed (Brassica napus L.) and wheat (Triticum aestivum L.) under controlled conditions Linking soil microbial community to C and N dynamics during crop residues decomposition." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR047.

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La transition agroécologique vise la triple performance agronomique, écologique et sociétale des exploitations agricoles. Un certain nombre de pratiques agricoles permet d’envisager la construction et le développement de systèmes de culture répondant à ces contraintes. Les légumineuses, par leur capacité à fixer l’azote atmosphérique, sont une alternative intéressante aux intrants azotés. Outre l’absence de fertilisation lors de leur culture, elles fournissent de l’azote à la culture suivante. Il existe cependant un manque de références sur certaines légumineuses à graines et notamment la cult
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16

Muschietti, Piana Maria del Pilar. "Managing crop residues and nitrogen fertiliser to improve wheat yield potential in water-limited environments." Thesis, 2020. http://hdl.handle.net/2440/129872.

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Nitrogen (N) supply to rain-fed crops is becoming increasingly challenging due to the decline in organic N reserves. In low-rainfall wheat cropping systems, low crop N uptake has been linked to asynchrony in soil N supply through mineralisation. This is especially true on sandy soils of south eastern Australia which have a low N supply capacity and are considered highly ‘risky’ in a management context. When the N released from soil and residues is insufficient, and/or the timing of biological supply is not well matched with crop demand, management of N inputs to the soil (i.e. legume residue a
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17

Schumacher, Derek David. "Residue management and yield characteristics of fine fescue seed crops." Thesis, 2005. http://hdl.handle.net/1957/29436.

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Chewings fescue [Festuca rubra L. subsp. fallax (Thuill.) Nyman] is a desired turfgrass with dense sod forming capabilities and superior shade tolerance. Thermal residue management (open-field burning) has traditionally been used to remove post-harvest residue and maintain seed yield over the life of the stand. However, alternative non-thermal residue management practices have been observed to produce adequate seed yields dependent upon cultivar. Strong creeping red fescue (F. rubra L. subsp. rubra) is desired for its prolific tillering capacity and creeping rhizomatous growth habit. In contra
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18

Henry, Scott C. "The effects of cultivar selection, seeding rate and N fertility on crop residue production and grain yield." 1996. http://hdl.handle.net/1993/12223.

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19

Gurganus, Kent Rodgers. "Influence of plant available water on yield potential and crop water stress index in corn." 2005. http://www.lib.ncsu.edu/theses/available/etd-11172005-101902/unrestricted/etd.pdf.

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20

Holzapfel, Christopher Brian. "Estimating nitrogen fertilizer requirements of canola (Brassica napus L.) using sensor-based estimates of yield potential and crop response to nitrogen." 2008. http://hdl.handle.net/1993/2996.

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The feasibility of using optical sensors and non-nitrogen limiting reference crops to determine post-emergent nitrogen fertilizer requirements of canola was evaluated. Normalized difference vegetation index was well suited for estimating yield potential and nitrogen status. Although sensor-based nitrogen management was generally agronomically feasible for canola, the economic benefits of doing so remain uncertain because of the added cost of applying post-emergent nitrogen.<br>February 2008
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21

(12804776), Stephen Barry Johnson. "Nitrogen fixation by potential ley pasture legumes for Central Queensland." Thesis, 1997. https://figshare.com/articles/thesis/Nitrogen_fixation_by_potential_ley_pasture_legumes_for_Central_Queensland/20010641.

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<p>Yield decline following continuous cropping cycles in Central Queensland has been attributed to the declining soil nitrogen status. In this study an assessment of the level of nitrogen fixation was made to assist in the selection of potential ley pasture legumes for use in rotational systems to achieve sustainable cropping yields.</p> <p>Twenty one winter and summer growing legumes were evaluated for nitrogen fixation in glasshouse trials in two seasons. Nitrogen fixation was determined using the hydrogen evolution technique (an instantaneous measure of fixation rate) in an artificial media
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